Modular block for a retainer wall



FIG. 1 is a front elevational view of a modular block for a retainer wall showing my new design;

FIG. 2 is a top plan view of FIG. 1;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view of FIG. 1;

FIG. 5 is a front perspective view of the modular block for a retainer wall; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for modular block for a retainer wall, as shown. 